Exception Removing all Combo Box Items with JComboBox Open

Question

I need to remove all the elements at my JComboBox, using .removeAllItems() it works fine! But I notice that there is a small problem, maybe a bug? I don't know.

If I leave the JComboBox opened, and then try to remove all the items, an exception is thrown:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0

I tryed to close the popup before calling the removeAllItems, like this:

private void removeAllClassesAvailable() {
        classeComboBox.hidePopup();
        classeComboBox.removeAllItems();
}

But still didn't work out !

Maybe because my JComboBox is inside a JTable?

Answer 1

Looks like one of the listeners added to the combobox tries to process selection. Try to remove the listener(s) from the combo before removing items and readd after.

Answer 2

Try to put a global variable boolean in order to avoid the control keep fireing new events:

public static boolean avoidNewEvents;

.............

private void 
    jCBoxSubCategoriaActionPerformed(java.awt.event.ActionEvent evt) {                                                  
    // ComboBox 
    //
    if (Form.avoidNewEvents==false) return;
    .............

      //Avoid new events to fire recursively
      FORM.avoidNewEvents=false;

       /  
       jCBoxSubCategoria.removeAllItems();

     //Reset:
     FORM.avoidNewEvents=true;